Do you know why corrosion occurs?

What do you mean by corrosion? How can you prevent it ?

Do you know, why farmers plough the field and leave so for sometime under the sun?

Do you know why a person gets tired standing at a place for a long time ?

Do you think reproduction occurs only for continuation of life ?

Do you know what 'soap' is?

P : Corrosion of iron is an oxidation process. Q : Corrosion occurs in presence of water and air.

Do you know why Newlands proposed the law of octaves ? Explain your answer in terms of the modern structure of the atom .

How do you know the percolation rate of soil?

Do you know the common names of potato in different languages?